With the Royal Society smoke ‘n’ sea level rise

Professor Keith Hunter, the Society’s Vice President of Physical Sciences, who contributed to the paper, says researchers are starting to be able to estimate the amount of rise that we should expect to see over this century and beyond. But he says these projections of future sea level rise depend upon the future melting of ice sheets, which is poorly known.

“The uncertain knowledge about ice sheet behaviour is the key reason why IPCC projections in 2007 did not state upper bounds for sea level rise. Similarly, Ministry for the Environment guidance in 2008 wisely left open the question of any upper limit on sea level rise.”

The paper states that some early scientific work into the effect of a warming climate on ice sheets in Greenland and Antarctica suggested that many metres of sea level rise could occur within a century. However, it says few scientists now consider that such rates are possible.

What do we learn from this?

We learn that we can’t guess future sea level rise, since we can’t guess future ice sheet melting; our mates at the UN and the MfE won’t touch it, and our first guess was several metres but now only the cranks go that far.

The press release expresses complete ignorance on future sea level rise. Great. So we also learn that scientists can make complete ignorance appear very interesting. Continue Reading →

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Hot spot doesn’t exist

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GHG fingerprint missing

About 2000, climate scientists predicted and the IPCC agreed that, if the global temperature was strongly influenced by carbon dioxide (or GHG generally), there would be a unique "fingerprint" of that influence high over the tropics — a tropospheric "hot spot". So they started looking for it. Pretty soon after that, some of them made up wild claims that they'd found it, but at the same time others were inventing fanciful reasons for why it wasn't there. It's still missing.